Dioxocyclohexanecarboxanilide insecticides and acaricides

Abstract

The present invention relates to certain carboxanilide insecticidal and acaricidal methods and compositions. It further relates to certain carboxanilides employed as active ingredients therein.

Description

The present invention relates to certain novel carboxanilides. It further relates to the use of certain known carboxanilides and the novel carboxanilides as insecticides and acaracides. It further relates to the synthesis of the carboxanilides through the reaction of a 1,3-cyclohexanedione with a phenylisocyanate or phenylisothiocyanate.

The carboxanilides useful as insecticides and acaracides in the present invention may be represented by the following structure: ##SPC1##

Wherein R and R.sub.1 are each selected from the group consisting of hydrogen, lower alkyl (C.sub.1 -C.sub.4), phenyl, halophenyl, and benzyl; R.sub.2 is sulfur or oxygen; R.sub.3 and R.sub.4 are each selected from the group consisting of hydrogen, lower alkyl (C.sub.1 -C.sub.4) and phenyl; W is hydrogen or halogen; X is hydrogen, halogen, lower alkyl (C.sub.1 -C.sub.4), halo-substituted lower alkyl (C.sub.1 -C.sub.4), lower alkoxy (C.sub.1 -C.sub.4), lower alkylthio (C.sub.1 -C.sub.4), or nitro; Y is hydrogen, halogen, lower alkyl (C.sub.1 -C.sub.4) or halo-lower alkyl (C.sub.1 -C.sub.4); and Z is hydrogen or halogen.

Suitable lower alkyl substituents include, for example, methyl, ethyl, n-propyl, iso-propyl, n-butyl, sec-butyl groups. The corresponding alkoxy and alkylthio groups are also suitable for use in the present invention. Suitable halogen substituents include, for example, fluoro, chloro, bromo and iodo groups. Suitable lower carbalkoxy groups include, for example, carbomethoxy, carbethoxy, carbopropoxy and carbobutoxy groups.

Suitable halo substituted lower alkyl groups include, for example, ennechlorobutyl, heptachloropropyl, 2,2,2-trichloroethyl, 2,2,2-tribromoethyl, 2,2-dichloroethyl, 2-fluoroethyl, 2-bromoethyl, 2-chloroethyl, chlorodifluoromethyl, chloromethyl, bromomethyl, fluoromethyl, and the like. Of the numerous suitable halo substituted lower alkyl substituents, a few of which are mentioned above, the trihalomethyl substituents are especially preferred. Within this preferred group one may mention trichloromethyl and trifluoromethyl as being especially preferred.

Suitable halophenyl groups include, for example, the ortho and para, mono and disubstituted bromo and chlorophenyl groups. Parachlorophenyl substituents are among the preferred.

The carboxanilides which are employed in the pesticidal methods of the present invention have the formula: ##SPC2##

Wherein R and R.sub.1 are each selected from the group consisting of hydrogen, phenyl, halophenyl, benzyl and lower alkyl (C.sub.1 -C.sub.4); R.sub.2 is sulfur or oxygen; R.sub.3 and R.sub.4 are each selected from the group consisting of hydrogen, lower alkyl (C.sub.1 -C.sub.4) and phenyl; W is hydrogen or halogen; X is hydrogen, halogen, lower alkyl (C.sub.1 -C.sub.4), halo-substituted lower alkyl (C.sub.1 -C.sub.4), lower alkoxy (C.sub.1 -C.sub.4), lower alkylthio (C.sub.1 -C.sub.4), cyano, carb-lower alkoxy (C.sub.1 -C.sub.4) or nitro; Y is hydrogen, halogen, lower alkyl (C.sub.1 -C.sub.4) or halo-lower alkyl (C.sub.1 -C.sub.4) and when X and Y are taken together they can form a benzo group; and Z is hydrogen or halogen. Known carboxanilides within this class are discussed, for example, by N. Rogers et al., J. Chem. Soc., page 341(1955) and by T. Ukita et al., Chem. Pharm. Bull. (JAP), 8, 1016-20(1960).

The synthetic process for the preparation of the curboxanilides employed in the pesticidal process involves the reaction of a 1,3-cyclohexanedione with a phenylisocyanate or a phenylisothiocyanate. The reaction is generally carried out in the presence of a tertiary organic amine, with or without an organic solvent. Elevated temperatures are generally employed to facilitate the reaction. Temperatures in the range of from about 30.degree.C. to about 150.degree.C. are generally suitable, with temperatures in the range of from about 50.degree.C. to about 100.degree.C. being preferred. Following the period of heating, which will usually be under reflux, the carboxanilide may be precipitated by the addition of an aqueous solution of mineral acid. The product may then be recovered from the mixture by any convenient means, as, for example, by filtration, centrifugation or the like. If desired, purification can be effected by redissolving the product in a solvent of moderate polarity, such as ethyl ether, a C.sub.1 -C.sub.4 alcohol, cyclohexane, methylene chloride, or the like and filtering off the insoluble material. The desired carboxanilide can be recovered from the filtrate by evaporation. This synthetic reaction scheme may be graphically illustrated as follows: ##SPC3##

The isocyanates and isothiocyanates employed in the preparation of the carboxanilides may be conveniently prepared from the appropriate anilides by reaction with phosgene or thiophosgene. Typical procedures for these general reactions are set forth by S. Petersen et al., Chemische Berichte, 81, page 31-8(1948), C.A., 43, page 169a; E. Dyer et al., JACS, 54, 777/87(1932); Wagner and Zook, Synthetic Organic Chemistry, pages 640 and 827-30, John Wiley & Sons, Inc. (1953).

For use as insecticides or acaricides, the carboxanilides are formulated and applied by conventional methods to the foliage of plants to protect them from pests which feed thereon, or to the soil to protect plants from soil-borne pests as well as warm-blooded animals, such as farm, domestic, zoo and laboratory animals, to protect them against and/or rid them of insect and acarid infection. They may also be applied to breeding sites of the insects and acaricides to control the egg, larvae and adult stages of breeding pest populations. In this regard, 4'-chloro-2-hydroxy-6-oxo-1-cyclohexene-1-carboxanilide is preferred as a larvicidal and ovicidal agent for the control of insects and acarids. These compounds are advantageously formulated as dusts, dust concentrates, emulsifiable liquids, wettable powders and the like.

The dusts are usually prepared by simply grinding together from about 1% to 15% by weight of the active carboxanilide with a finely divided inert diluent such as walnut flour, diatomaceous earth, fullers earth, attaclay, talc, or kaolin. Dust concentrates are made in similar fashion, excepting that about 16% to 75% by weight of active ingredient is ground together with the diluent. In practice, this concentrate is then generally admixed at the site of use with more inert diluent before it is applied to the plant foliage or animals which are to be protected from insect and acarid attack.

Wettable powders are generally prepared in the same manner as dust concentrates, but usually about 1% to 5% by weight of a dispersing agent, for example an alkali metal lignosulfonate and about 1% to 5% of a surfactant, such as alkyl phenoxy polyethylene ethanol, naphthalene sulfonic acid condensate, or an ester of sodium isothionate, is incorporated in the formulation. For application to agronomic crops, shrubs, ornamentals, and the like, the wettable powder is usually dispersed in water and applied as a spray. For treatment of warm-blooded animals, the same spray type application may be used or the wettable powder may be dispersed in the water of a dipping trough through which the animals are driven.

The emulsifiable liquids may be prepared by dissolving the active compound in an organic solvent, such as acetone, and admixing the thus formed solution with other organic solvents, such as cyclohexanone and toluene containing an emulsifier such as calcium dodecylbenzene sulfonate or an alkylaryl polyether alcohol. The emulsifiable liquid is then generally dispersed in water for spray or dip application.

In practice, we have found that the compounds of the present invention in which at least one of X, Y or Z represents a substituent other than hydrogen, are preferred for use in controlling acarids. Moreover, we have found the mono-, di-, and trihalosubstituted carboxanilides, particularly the mono-, di- and tri-chloro carboxanilides, are most effective for inhibiting or reducing tick infestations on warm-blooded animals.

The present invention is further illustrated by the examples set forth below which are not to be taken as limitative thereof. In each case, parts are by weight unless otherwise indicated.

EXAMPLES 1-19

Preparation of 3',4'-Dichloro-2-Hydroxy-6-Oxo-1-Cyclohexene-1-Carboxanilide and Related Compounds

A solution containing 1,3-cyclohexanedione, 144 parts, 3,4-dichlorophenylisocyanate, 240 parts, in pyridine, 800 parts, is heated at 110.degree.-115.degree.C. for 2 hours. After cooling, the mixture is poured with stirring into a solution containing 2000 parts of concentrated hydrochloric acid in 7500 parts of cold water. A solid formed which is collected and washed on the filter with cold water and dried in a vacuum oven at 50.degree.C. The pure carboxanilide is obtained by crystallization from 7000 parts of ethyl alcohol to give 242 parts of light tan colored crystals, melting point 131.degree.-132.degree.C.

The compounds of Table I having the structure set forth below are prepared by essentially the same procedure as above using the appropriately substituted isocyanate in place of the 3,4-dichlorophenylisocyanate. Reaction periods vary from 2 to 4 hours at temperatures usually of 95.degree.-100.degree.C. In cases where appreciable amounts of substituted carbanilides corresponding to the isocyanates are formed, purification is further effected by dissolving the carboxanilide in a solvent of moderate polarity, such as ethyl ether or methylene chloride, filtering off the insoluble carbanilide, and recovering the product from the filtrate by evaporation of the solvent.

Table I __________________________________________________________________________ Analysis Substituents Melting Calculated Found Example X Y Point C H N C H N __________________________________________________________________________ 2 3-Cl 4-Cl 131.degree.C.-132.degree.C. 52.02 3.69 4.66 51.78 3.37 4.83 3 2-Cl 5-Cl 123.degree.C.-125.degree.C. 52.02 3.69 4.66 52.09 3.66 4.78 4 2-Cl 4-Cl 174.degree.C.-175.degree.C. 52.02 3.69 4.66 52.26 3.60 4.95 5 2-F H 124.degree.C.-125.degree.C. 62.67 4.82 5.62 63.17 4.83 5.70 6 3-F H 84.degree.C.-85.degree.C. 62.67 4.82 5.62 63.34 4.86 5.28 7 4-F H 110.degree.C.-111.degree.C. 62.67 4.82 5.62 62.39 4.83 5.62 8 4-Br H 104.degree.C.-105.degree.C. 50.34 3.90 4.52 50.38 3.93 4.70 9 4-CH.sub.3 H 113.degree.C.-114.degree.C. 68.55 6.17 5.71 68.28 6.33 5.44 10 2-C.sub.2 H.sub.5 H 78.degree.C.-80.degree.C. 69.48 6.61 5.40 69.62 6.76 5.23 11 2-CH.sub.3 3-Cl 121.degree.C.-122.degree.C. 60.11 5.04 5.01 60.11 5.02 5.01 12 2-CH.sub.3 4-Cl 155.degree.C.-156.degree.C. 60.11 5.04 5.01 60.19 5.04 4.79 13 3-Cl 4-CH.sub.3 108.degree.C.-109.degree.C. 60.11 5.04 5.01 59.99 5.18 4.95 14 2-CH.sub.3 4-Br 158.degree.C.-159.degree.C. 51.87 4.35 4.32 52.08 4.38 4.27 15 4-I H 122.degree.C.-123.degree.C. 43.72 3.39 3.92 43.82 3.40 3.83 16 4-CH.sub.3 S H 99.degree.C.-100.degree.C. 60.62 5.45 5.05 60.45 5.40 5.21 17 2-CF.sub.3 H 85.degree.C.-86.degree.C. 56.19 4.04 4.68 56.17 3.99 4.55 18 3-CF.sub.3 H 102.degree.C.-103.degree.C. 56.19 4.04 4.68 56.32 4.18 4.67 19 3-CF.sub.3 5-CF.sub.3 119.degree.C.-121.degree.C. 49.06 3.02 3.81 49.52 3.05 3.25 __________________________________________________________________________

EXAMPLE 20

Preparation of 2'-Fluoro-2-Hydroxy-6-Oxo-1-Cyclohexene-1-Carboxanilide ##SPC4##

To 6.0 grams of 1,3-cyclohexanedione (0.054 mole) and 5.9 grams of triethylamine (0.059 mole) dissolved in 150 ml. of dry acetone, is added 7.4 grams of o-fluorophenylisocyanate (0.054 mole). The mixture is heated to reflux until none of the isocyanate is visible by infrared spectrophotometry (requires 1 to 3 hour). The orange solution is concentrated, and taken up in chloroform. The chloroform is washed with a dilute aqueous solution of hydrochloric acid, and is dried with magnesium sulfate. Concentration by evaporation yielded 5.0 grams of gummy orange solids. Recrystallization from cyclohexane yields 4.0 grams of the desire product in the form of white crystals; melting point 124.degree.C.- 125.5.degree.C. Infrared spectrophotometry and nuclear magnetic resonance spectrometry confirm the structural assignment of the product as 2'-fluoro-2-hydroxy-6-oxo-cyclohexene-1-carboxanilide.

EXAMPLE 21

Preparation of 3'-Chloro-2-Hydroxy-6-Oxo-1-Cyclohexene-1-Carboxy-o-Toluidide ##SPC5##

A solution containing 11.2 parts of cyclohexane-1,3-dione and 16.8 parts of 3-chloro-o-tolylisocyanate in pyridine, 100 parts, is heated at 90.degree.C.-100.degree.C. for two hours and then allowed to cool to room temperature. The resulting light slurry is poured into 350 parts of cold 2-normal hydrochloric acid and the crude product is recovered by filtration. The damp solid is dissolved in 600 parts of ethyl alcohol and filtered from 2.9 parts of insoluble solid. The filtrate is chilled on an ice-water bath to precipitate the desired product, which is then filtered to give 17.1 parts of pale buff platelets, melting point 120.5.degree.C.-121.5.degree.C.

Analysis Calculated for C.sub.14 H.sub.14 ClNO.sub.3 : C, 60.11 H, 5.04; Cl, 12.68; N, 5.01. Found: C, 60.11; H, 5.02; Cl, 12.75; N, 5.01.

EXAMPLES 22-43

Preparation of 4'-Chloro-2-Hydroxy-6-Oxo-1-Cyclohexene-1-Carboxanilide and Related Compounds ##SPC6##

A solution containing 8.5 parts of cyclohexane-1,3-dione, 11.5 parts of p-chlorophenylisocyanate and 7.6 parts of triethylamine in 200 parts of acetone is stirred and refluxed for two hours. The infrared spectrum then shows no isocyanate (band at 2270 cm.sup..sup.-1). The solution is concentrated under reduced pressure to about 50 parts, with separation of a few crystals, and poured with stirring into 500 parts of 2-normal hydrochloric acid. The precipitated solid is collected by filtration and dried. The resulting solid is mixed with chloroform, 250 parts by volume, and filtered from 6.5 parts of insoluble by-product. Removal of chloroform from the filtrate leaves a light pink solid which is crystallized from alcohol to give 6.7 parts of nearly white solid, melting point 113.degree.C.-114.degree.C.

Analysis Calculated for C.sub.13 H.sub.12 ClNO.sub.3 : C, 58.76; H, 4.56; Cl, 13.34; N, 5.27. Found: C, 58.74; H, 4.55; Cl, 13.16; N, 4.97.

The same product is obtained as a light red powder when the reaction is run in pyridine. Yield, 11.6 parts of recrystallized product.

The compounds of Table II, having the structure set forth below, are prepared by essentially the same procedure, using the appropriately substituted phenylisocyanates for the p-chlorophenylisocyanate used therein.

TABLE II ______________________________________ Substituents Melting % Example X Y Point Yield ______________________________________ 23 3-Cl 4-Cl 131.degree.C.-132.degree.C. 62 24 3-Cl H 92.5.degree.C.-94.degree.C. 56 25 4-Cl H 113.degree.C.-114.degree.C. 58 26 4-Cl 2-CH.sub.3 155.degree.C.-156.degree.C. 49 27 2-Cl 4-NO.sub.2 267.degree.C.-267.5.degree.C. 43 28 3-Cl 4-CH.sub.3 108.degree.C.-109.degree.C. 20 29 4-I H 122.degree.C.-123.degree.C. 54 30 4-Br 2-CH.sub.3 158.degree.C.-159.degree.C. 42 31 2-Cl 4-Cl 174.degree.C.-175.5.degree.C. 38 32 4-CH.sub.3 H 112.5.degree.C.-114.degree.C. 44 33 2-C.sub.2 H.sub.5 H 78.degree.C.-80.degree.C. 34 34 4-Br H 104.degree.C.-105.degree.C. 44 35 4-F H 110.degree.C.-111.degree.C. 47 36 4-SCH.sub.3 H 99.degree.C.-100.degree.C. 43 37 2-CF.sub.3 H 84.5.degree.C.-85.5.degree.C. 60 38 3-CF.sub.3 H 102.degree.C.-103.degree.C. 75 39 3-F H 84.degree.C.-84.5.degree.C. 62 40 3-CF.sub.3 5-CF.sub.3 119.degree.C.-121.degree.C. 36 41 4-Cl 3-NO.sub. 2 149.5.degree.C.-150.5.degree.C. 66 42 3-Cl 2-CH.sub.3 120.5.degree.C.-121.5.degree.C. 61 43 4-O--CO--CH.sub.3 H 160.5.degree.C.-161.5.degree.C. 40 ______________________________________

EXAMPLES 44-53

Insecticidal Activity

The efficacy of the compounds of the present invention for controlling insects is demonstrated by the following tests, wherein aphids and armyworms are used as test species. The procedures employed are as follows. Results obtained are reported in Table III.

Southern Armyworm

(Prodenia eridania Cram.)

Compounds to be tested are made up as 0.1% solutions in a 65% acetone -- 35% water mixture. Sieva lima bean leaves are dipped in the test solution and set in the hood to dry. When dry, they are placed in four-inch petri dishes which have a moist filter paper in the bottom, and then third-instar armyworm larvae about 3/8 inch long are added to each dish. The dishes are covered and held at 80.degree.F., 60% R.H. After 2 days, mortality counts and estimates of the amount of feeding are made.

Nasturtium Aphids

(Aphis rumicis L.)

The compounds to be tested are made up as 0.1% solutions in a 65% acetone -- 35% water mixture. Three-inch pots containing a nasturtium plant two inches tall and infested two days before are selected for testing. The pots are placed on a turntable (4 RPM) and sprayed for two revolutions with an atomizer at 20 psi. air pressure. The spray tip is held about six inches from the plants and the spray is directed so as to give complete coverage of the aphids and the plants. The sprayed plants are laid on their side on white enamel trays which have had the edges coated with oil as a barrier. Mortality estimates are made after holding for two days at 70.degree.F.

TABLE III __________________________________________________________________________ % Mortality Southern Nasturtium Example Compound Armyworm Aphids __________________________________________________________________________ 44 100 90 45 40 95 46 100 100 47 70 100 48 100 100 49 90 98 50 90 98 51 60 100 52 100 100 53 0 100 __________________________________________________________________________

EXAMPLES 54-59

The efficacy of the compounds of the present invention against spider mites is demonstrated in the following tests using the procedure set forth below. The results achieved are shown in Table IV below.

Two-Spotted Spider Mite

(Tetranychus telarius L.)

Compounds to be tested are made up as 0.1% solutions in a 65% acetone -- 35% water mixture. Sieva lima bean plants with the first pair of leaves 3 to 4 inches in size are infested about 5 hours before testing, using about 100 to 200 adult mites per leaf. The infested leaves are dipped in the test solutions (in four-inch crystallizing dishes) for 3 seconds, and the plants set in the hood to dry. The treated plants are held for two days at 80.degree.F., 60% R.H., and the adult mite mortality calculated by counting dead and alive adults on one leaf under the 10X binocularscope. The other leaf is held an additional 5 days and then is examined at 10X power to estimate the kill of eggs and newly-hatched nymphs, giving a measure of ovocidal and residual action, respectively.

TABLE IV ______________________________________ % Mortality Example Substituents Spider Mites ______________________________________ 54 3,4-di-Cl 100 55 3,6-di-Cl 100 56 3-Cl 100 57 4-Cl 100 58 4-I 100 59 2,4-di-Cl 50 ______________________________________

EXAMPLES 60-78

Effective control of acarina larvae is demonstrated in the following tests with larvae of Boophilus microplus, a one-host tick which can remain on a single host through its three life stages, i.e., larvae, nymph and adult. In these tests, a 10% acetone -- 90% water mixture contains from 1.0 to 100 ppm. of test compound. Twenty larvae are enclosed in a pipet sealed at one end with a gauze material and solution containing the test compound is then drawn through the pipet with a vacuum hose simulating a spray system. The ticks are then held for 48 hours at room temperature and mortality is determined. The results achieved are set forth in Table V below.

TABLE V ______________________________________ Substituents ppm of Active Example X Y % Mortality Ingredient ______________________________________ 60 2-Cl 4-Cl 80 1.0 61 3-Cl 4-Cl 100 10.0 100 3.3 62 2-Cl 5-Cl 100 10.0 63 4-Cl 2-CH.sub.3 100 10.0 64 3-Cl 4-CH.sub.3 100 10.0 65 4-Cl 3-NO.sub.2 80 33.0 66 5-Cl 6-CH.sub.3 100 3.3 67 4-Br H 80 33.0 68 4-Br 2-CH.sub.3 100 3.3 69 4-I H 100 10.0 70 3-F H 80 3.3 71 4-F H 100 33.0 72 2-CF.sub.3 H 100 33.0 73 3-CF.sub.3 H 100 33.0 100 33.0 74 3-CF.sub.3 5-CF.sub.3 100 10.0 75 4-CH.sub.3 H 80 33.0 76 2-C.sub.2 H.sub.5 H 100 100.0 100 50.0 77 4-SCH.sub.3 H 100 33.0 78 H H 100 100.0 100 50.0 ______________________________________

EXAMPLES 79-82

The efficacy of the compounds of the invention for controlling acarine nymphs is demonstrated following the same procedure used in Example 60, but substituting 10 nymphs of the three-host tick, Amblyomma americanum, for the 20 Boophilus larvae. Compounds are tested at from 10 ppm to 100 ppm of active ingredient in 10% acetone aqueous solution. The results achieved are reported in Table VI below.

TABLE VI ______________________________________ Substituents ppm of Active Example X Y % Mortality Ingredient ______________________________________ 79 3-Cl 4-Cl 100 10 80 3-Cl H 100 33 81 4-Cl H 100 10 82 2-F H 70 100 ______________________________________

EXAMPLES 83-96

Efficacy of the compounds of the present invention for the control of adult ticks is demonstrated in the following tests wherein adult Boophilus microplus ticks which have dropped from cattle are collected and used for testing.

Compound to be tested is dissolved in a 35% acetone -- 65% water mixture in sufficient amount to provide from about 40 to 2000 ppm of compound in the test solution. Ten ticks per treatment are used and they are immersed in test solution for 3 to 5 minutes, then removed and placed in cages and held at room temperature for three days. Mortality counts are then made and recorded. For these tests, non-resistant ticks as well as ethion-resistant and dioxathion-resistant ticks are used since the latter two are among the most difficult of their kind to control. Results of these tests are given in Table VII below.

TABLE VII __________________________________________________________________________ % Mortality Substituents ppm of Active Ethion Dioxathion Non- Ex. R R.sub.1 X Y Ingredient Resistant Resistant Resistant __________________________________________________________________________ 83 H H 3-Cl H 2000 80 50 -- 84 H H 4-Cl H 1000 100 100 -- 500 20 50 -- 85 H H 3-Cl 4-CH.sub.3 2000 50 10 -- 86 H H 3-Cl 4-Cl 1900 100 100 -- 800 50 100 -- 40 10 40 -- 87 CH.sub.3 CH.sub.3 H H 2000 90 80 -- 88 H H 3-Cl H 1000 -- -- 100 89 H H 4-Cl H 1000 -- -- 100 90 H H 3-Cl 4-Cl 330 -- -- 100 100 -- -- 10 91 H H 4-Cl 2-CH.sub.3 1000 -- -- 100 92 H H 3-Cl 4-CH.sub.3 1000 -- -- 100 93 H H 2-Cl 3-Cl No test 94 CH.sub.3 CH.sub.3 2-Cl 3-Cl No test 95 H H p-oMe H No test 96 CH.sub.3 CH.sub.3 p-oMe H No test __________________________________________________________________________

EXAMPLES 97-101

Following the procedures set forth in Examples 60 through 78 and 79 through 82 above, the following data were obtained.

TABLE VIII __________________________________________________________________________ ppm. of Boophilus Amblyomma Substituents Active microplus americanum Example R R.sub.1 X Y Ingredient (larvae) Nymphs __________________________________________________________________________ 97 CH.sub.3 CH.sub.3 H H 20 -- 100 98 H H 2-Cl 3-Cl 10 100 -- 99 CH.sub.3 CH.sub.3 2-Cl 3-Cl 80 100 -- 100 H H p-OCH.sub.3 H 100 100 -- 101 CH.sub.3 CH.sub.3 p-OCH.sub.3 H 100 100 -- __________________________________________________________________________

EXAMPLES 102-139

Preparation of Dioxocyclohexanecarboxanilides ##SPC7##

wherein R.sub.2 is O or S

Following the procedure of Example 20, equimolar quantities (0.064 moles) of the appropriate dione, isocyanate or isothiocyanate and triethylamine in 160 ml. of dry acetone are heated at reflux for about 9 hours. The mixture is filtered and the filtrate is poured on ice and stirred to afford a first crop of the carboxanilide. This is then collected and the filtrate is acidified to pH 4 with concentrated hydrochloric acid to afford a second crop, which is collected. The combined crops are then recrystallized from appropriate solvents such as alcohols, alcohol-water, or acetone. Compounds prepared by this procedure are listed in Table IX below by structure with their melting points and recrystallization solvents.

TABLE IX __________________________________________________________________________ Melting Recrystal- Example Point lization Number Structure .degree.C. Solvent __________________________________________________________________________ 102 142.5- Acetone 143.5 103 227-228 Acetone 104 -- 105 78-80 Hexane 106 94.5-97 95% EtOH 107 101-104 95% EtOH 108 120-124 95% EtOH 109 157- Me.sub.2 CO/- 159.5 95% EtOH 110 116.5- 95% EtOH 119 111 114- 95% EtOH 116.5 ether 112 95-97 95% EtOH 113 109-111 MeOH ether 114 122-125 MeOH 115 148- MeOH 150.5 116 86.5- 95% EtOH 88.5 117 155- 95% EtOH 157.5 118 143-146 95% EtOH 119 93.5-96 95% EtOH 120 154-156 95% EtOH 121 140-143 95% EtOH 122 212-215 Me.sub.2 CO/- 95% EtOH 123 203- Me.sub.2 CO 205.5 124 129.5- MeOH 132 125 117-120 MeOH 126 157-159 95% EtOH 127 183- Me.sub.2 CO 186.5 128 147- 95% EtOH 149.5 129 118.5- 95% EtOH 120.5 130 148.5- 95% EtOH 150.5 131 153-156 95% EtOH 132 114- 95% EtOH 115.5 133 167-170 95% EtOH 134 174-177 95% EtOH 135 144-147 MeOH 136 151-153 95% EtOH 137 184-187 Me.sub.2 CO 138 157.5- 2B EtOH 159 139 138-141 MeOH __________________________________________________________________________

EXAPLES 140-171

Preparation of Dioxocyclohexanecarboxanilides ##SPC8##

wherein R.sub.2 is O or S

The dione (0.03 mole) is dissolved or suspended in 25 ml. of dry methyl ethyl ketone and stirred. The isocyanate or isothiocyanate (0.033 mole or 10% excess) is dissolved in 4 ml. of methyl ethyl ketone and added to the mixture. To this is added a catalytic amount (about two drops) of triethylamine. The mixture is then refluxed for about 2 hours and cooled to afford the carboxanilide, which is collected and washed with ethyl ether. Occasionally, the product will not crystallize from the reaction mixture, and hence, the mixture is evaporated to dryness to afford the crude carboxanilide. The product is then recrystallized from appropriate solvents such as alcohols, alcohol-water mixtures, or acetone. Compounds prepared by this procedure are listed in Table X below by structure with their melting points and recrystallization solvents.

TABLE X __________________________________________________________________________ Melting Recrystal- Example Point lization Number Structure .degree.C. Solvent __________________________________________________________________________ 140 233-236 DMF dec. 141 175.5- 95% EtOH 179 142 137.5- 95% EtOH 139 143 126-131 95% EtOH 144 183-184 2B EtOH 145 98.5- 95% EtOH 101 146 127.5- 95% EtOH 130 147 155-160 Me.sub.2 CO 148 129-134 2B EtOH 149 198-200 EtOAc 150 105.5- MeOH 111.5 .sup..gtoreq. 76-78 95% EtOH 152 86-93 MeOH 153 147-150 Me.sub.2 CO 154 191- EtOAC 194.5 155 131- 2B EtOH 134.5 156 180.5- 2B EtOH 182.5 157 129-131 2B EtOH 158 163-165 Me.sub.2 CO 159 148-151 2B EtOH 160 175.5- EtOAc 177.5 161 170.5- Me.sub.2 CO 173.5 162 130.5- 95% EtOH 133.5 163 166.5- Me.sub.2 CO 168 164 81-90 MeOH 165 154.5- Me.sub.2 CO 156 166 140- Me.sub.2 CO 141.5 167 106-110 95% EtOH ether 168 122- EtOH 123.5 169 126.5- Acetone 128.5 170 135-136 Acetone 171 148-150 Acetone __________________________________________________________________________

EXAMPLES 172-211

Effective control of acarina larvae is demonstrated in the following tests with larvae of Boophilus microplus, a one-host tick which can remain on a single host through its three life stages, i.e., larvae, nymph and adult. In these tests, a 10% acetone -- 90% water mixture contains from 1.0 to 100 ppm. of test compound. Twenty larvae are enclosed in a pipet sealed at one end with a gauze material and solution containing the test compound is then drawn through the pipet with a vacuum hose simulating a spray system. The ticks are then held for 48 hours at room temperature and mortality is determined. The results achieved are set forth in Table XI below.

TABLE XI __________________________________________________________________________ ppm. Example Substituents Active % Number R R.sub.1 R.sub.2 R.sub.3 R.sub.4 W X Y Z Ingredient Mortality __________________________________________________________________________ 172 H H O H H H --OCH.sub.3 (4) H H 100 100 173 CH.sub.3 CH.sub.3 0 H H H --OCH.sub.3 (4) H H 100 100 174 H H O H H Cl (6) H H Cl (5) 10 100 175 CH.sub.3 CH.sub.3 O H H Cl (6) H H Cl (5) 33 80 176 H H O H H H benzo (5-6) H 33 80 177 H H O H H Cl (6) H H H 33 100 178 H H S H H H H H F (5) 100 100 179 H H S H H H H F (4) H 100 100 180 CH.sub.3 CH.sub.3 O H H Cl (6) H H H 33 100 181 H H O H H H --OCH.sub.3 (6) H H 100 100 182 CH.sub.3 CH.sub.3 O H H H H H Cl (5) 33 100 183 CH.sub.3 CH.sub.3 O H H H H CH.sub.3 (6) Cl (5) 33 100 184 CH.sub.3 CH.sub.3 O H H H CH.sub.3 (4) Cl (5) Cl (5) 33 100 185 CH.sub.3 CH.sub.3 O H H Cl (6) H Cl (4) H 3.3 100 186 H H O H H H CH.sub.3 (6) Cl (3) H 100 80 187 H H O H H H CH.sub.3 (6) CH.sub.3 (3) H 33 100 188 CH.sub.3 CH.sub.3 O H H H CH.sub.3 (6) CH.sub.3 (3) H 100 50 189 H H O H H H Cl (5) Cl (3) H 10 100 190 H H O H H Cl (6) H CH.sub.3 (4) H 33 100 191 CH.sub. 3 CH.sub.3 0 H H Cl (6) Cl (5) Cl (3) Cl (2) 100 20 192 H H O H H H CH.sub.3 (5) H Cl (2) 10 100 193 H H O H H Cl (6) Cl (5) Cl (4) Cl (3) 3.3 100 194 CH.sub.3 H O H H H H H H 33 100 195 phenyl H O H H H H H H 3.3 100 196 H H O phenyl H H H Cl (5) Cl (4) 100 100 197 CH.sub.3 CH.sub.3 O H H Cl (6) Cl (5) Cl (4) Cl (3) 100 50 198 H phenyl O H H Cl (6) H Cl (4) H 100 100 199 H H O H phenyl H H H H 33 100 200 H H O C.sub.2 H.sub.5 H H H Cl (4) H 10 100 201 H H 0 C.sub.2 H.sub.5 H H CH.sub.3 (6) Cl (4) H 10 100 202 4-Cl- H O H H H H Cl (4) H 10 100 phenyl 203 CH.sub.3 H O H H H CH.sub.3 (6) Cl (4) H 100 80 204 CH.sub.3 H O H H H Cl (6) Cl (4) H 10 100 205 H H O phenyl H H CH.sub.3 (6) Cl (4) H 33 100 206 H H S H H H H Cl (4) H 100 50 207 CH.sub.3 CH.sub.3 S H H H H Cl (4) H 100 50 208 CH.sub.3 H O H H H H Cl (4) H 10 100 209 CH.sub.3 H O H H H Cl (5) Cl (4) H 1.0 100 210 phenyl H O H H H Cl (5) Cl (4) H 33 80 211 phenyl H O H H H H Cl (4) H 10 100 __________________________________________________________________________

EXAMPLES 212-225

Mosquito Egg and Larva Test

Test solutions are prepared in 50% acetone -- 50% water, initially at 1000 ppm. One ml. of 1000 ppm. solution is pipetted into 249 ml. of water in a 400 ml. beaker to yield a 4.0 ppm. test rate. About 100 eggs, 0 to 24 hours old, from Anopheles quadrimaculatus mosquitoes are added inside a wax paper ring floating on the surface of the water. Egg mortality results are noted after two days. Larval mortality results are noted after 3 days. Active compounds are further tested at tenfold dilutions until activity diminishes. The results achieved are set forth in Table XII below.

Ratings:

+ = killed 86% to 100%

.+-. = killed 41% to 85%

0 = killed 0% to 40%

- = not tested

TABLE XII __________________________________________________________________________ Concentration in ppm. Mosquito Example Substituents Eggs Larvae Number R R.sub.1 R.sub.2 R.sub.3 R.sub.4 W X Y Z 4 .4 4 .4 __________________________________________________________________________ 212 H H O H H H H Cl (4) H + .+-. - O 213 H H O H H H Cl (2) Cl (4) H O O + + 214 H H O H H H Cl (3) Cl (4) H O O + O 215 H H O H H F (5) H H H .+-. O + O 216 H H O H H H H F (4) H .+-. O + O 217 H H O H H H H CH.sub.3 (6) Cl (3) .+-. O + O 218 CH.sub.3 CH.sub.3 O H H H H CH.sub.3 (4) Cl (3) .+-. O + O 219 H H O H H H Cl (3) Cl (5) H + + .+-. O 220 H H O H H Cl (6) Cl (5) Cl (4) Cl (3) .+-. O + + 221 CH.sub.3 CH.sub.3 O H H Cl (6) Cl (5) Cl (4) Cl (3) + O + 222 H H O C.sub.2 H.sub.5 H H H Cl (4) H + 223 CH.sub.3 H O H H H H CH.sub.3 (6) Cl (4) + 224 CH.sub.3 H O H H H Cl (4) H H + 225 CH.sub.3 H O H H H Cl (5) Cl (4) H + __________________________________________________________________________

EXAMPLES 226-232

Budworm Egg and Larva Test

Test solutions are prepared in 50% acetone -- 50% water, initially at 100 ppm. A one-inch square piece of cheesecloth infested with about 100 eggs of Heliothis virescens is dipped for a second in the solution along with a young cotton leaf. These are allowed to dry and are placed in a covered wax paper cup. Egg mortality ratings are made after 3 days. Larval mortality ratings are made after seven days. Ratings are as shown below in Table XIII.

Ratings:

+ = killed 86% to 100%

.+-. = killed 41% to 85%

0 = killed 0% to 40%

- = not tested

TABLE XIII __________________________________________________________________________ Budworm Eggs Larvae Example Substituents 100 100 Number R R.sub.1 R.sub.2 R.sub.3 R.sub.4 W X Y Z ppm. ppm. __________________________________________________________________________ 226 H H O H H H H Cl (4) H + - 227 H H O H H H H Cl (4) Cl (3) + - 228 H H O H H H Cl (3) H Cl (5) .+-. + 229 CH.sub.3 H O H H H Cl (4) H H + - 230 CH.sub.3 H O H H Cl (5) Cl (4) H H + - 231 H H O C.sub.2 H.sub.5 H H Cl (4) H H + - 232 p-Cl- H O H H H Cl (4) H H + - phenyl __________________________________________________________________________

EXAMPLES 233-235

Mite Egg Test

Cotton plants are infested with mites (Tetranychus urticae) 4 hours before testing to allow egg laying. Plants are dipped in 1000 ppm. solution in 65% acetone/35% water. Adult mortality is noted after 2 days. Egg mortality or mortality of newly hatched nymphs is noted after 7 days. The results achieved are set forth in Table XIV below.

TABLE XIV __________________________________________________________________________ % Example Substituents Mortality Number R R.sub.1 R.sub.2 R.sub.3 R.sub.4 W X Y Z Mite Eggs __________________________________________________________________________ 233 H H O H H H Cl (4) H H 100 234 H H O H H H Cl (4) Cl (2) H 100 235 H H O H H H Cl (4) H Cl (3) 100 __________________________________________________________________________

Claims

1. A method for the control of pests selected from the group consisting of insects and acarids as well as the eggs or larvae thereof, comprising contacting said insects, acarids, or eggs or larvae thereof with a pesticidally effective amount of a compound having the formula: ##SPC9##

2. The method according to claim 1 where R.sub.2 is oxygen.

3. The method according to claim 1 where R.sub.2 is sulfur.

4. The method according to claim 2 where R, R.sub.1, R.sub.3, R.sub.4, W, Z and Y are each hydrogen, and X is halogen.

5. The method according to claim 2 where R, R.sub.1, R.sub.3, R.sub.4, W and Z are each hydrogen, and X and Y are halogen.

6. The method according to claim 2 where R, R.sub.1, R.sub.3, R.sub.4, W and Z are each hydrogen, X is halogen, and Y is lower alkyl (C.sub.1 -C.sub.4).

7. The method according to claim 2 wherein eggs or larvae are contacted.

8. The method according to claim 2 where the compound is: 3'-chloro-2-hydroxy-4,4-dimethyl-6-oxo-1-cyclohexene-1-carboxanilide.

9. The method according to claim 2 where the compound is: 3',4'-dichloro-3-ethyl-2-hydroxy-6-oxo-1-cyclohexene-1-carboxanilide.

10. The method according to claim 2 where the compound is: 4'-chloro-2-hydroxy-4-methyl-6-oxo-1-cyclohexene-1-carboxanilide.

11. The method according to claim 2 where the compound is: 4'-chloro-3-ethyl-2-hydroxy-6-oxo-1-cyclohexene-1-carboxanilide.

12. The method according to claim 2 where the compound is: 3',4'-dichloro-2-hydroxy-4-methyl-6-oxo-1-cyclohexene-1-carboxanilide.

13. The method according to claim 2 where the compound is: 4'-bromo-2-hydroxy-6-oxo-1-cyclohexene-1-carboxanilide.

14. The method according to claim 2 where the compound is: 2-hydroxy-4'-iodo-6-oxo-1-cyclohexene-1-carboxanilide.

15. The method according to claim 2 where the compound is: 4'-chloro-2-hydroxy-6-oxo-1-cyclohexene-1-carboxanilide.